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Forum: Coders. Asm / Hardware Today, 18:20
Replies: 101
Views: 2,203
Posted By ross
Well, this addressing mode can be really useful!...

Well, this addressing mode can be really useful! (for a new 68k derived ISA?)
[i'm joking, of course I understood what you meant :p]


EDIT: in fact I would not mind at all an architecture with...
Forum: Coders. Asm / Hardware Today, 15:44
Replies: 101
Views: 2,203
Posted By ross
:shocked Really? I did not know this. Of course...

:shocked
Really? I did not know this. Of course nobody would use those instructions, but I did not think there could be such a side effect.
I thought it was simply a read, of the float value on the...
Forum: Coders. Asm / Hardware Today, 15:16
Replies: 101
Views: 2,203
Posted By ross
Just to get along :) You're both right, simply...

Just to get along :)
You're both right, simply the 6502 if it had a 16-bit bus would access the memory at twice the speed of 68k.
But since we are in the real world, the 6502 actually reads the...
Forum: Coders. Asm / Hardware Today, 14:25
Replies: 101
Views: 2,203
Posted By ross
[OT] Just out of curiosity. Is there any actual...

[OT]
Just out of curiosity. Is there any actual problem that CLR really can generate?

Taking into consideration only the standard hardware registers (chipset and CIA) the only ones that come to...
Forum: Coders. Asm / Hardware Yesterday, 17:58
Replies: 101
Views: 2,203
Posted By ross
IRQ -> ipl field = level Yes, this is the...

IRQ -> ipl field = level


Yes, this is the little oddity :)
But admissible to allow an NMI to always be accepted.
Forum: Coders. Asm / Hardware Yesterday, 16:47
Replies: 101
Views: 2,203
Posted By ross
ipl=6 doesn't allow any maskable IRQ (same as 7) ...

ipl=6 doesn't allow any maskable IRQ (same as 7)
ipl=0 allows >0, so every IRQ
ipl=1 allows >1, and so on


Well, I can understand for the listed instructions, that are all with modification of...
Forum: Coders. Asm / Hardware Yesterday, 16:20
Replies: 101
Views: 2,203
Posted By ross
Maybe you mean ipl=6 is the same as ipl=7? This...

Maybe you mean ipl=6 is the same as ipl=7?
This anyway is unavoidable if you want a NMI...

However what makes me puzzled is the lack of tst (ofs,pc) when btst #x,(ofs,pc)* exists.
Ok ok in 020+...
Forum: Coders. General Yesterday, 12:28
Replies: 5
Views: 189
Posted By ross
The first fetched values (SPRxPOS/CTL pair) by...

The first fetched values (SPRxPOS/CTL pair) by sprites DMA are on line 20 for NTSC and 25 for PAL.
So on the first visible video line (21 or 26 respectively) you can have the first DATx usable. :)
Forum: Coders. General Yesterday, 12:14
Replies: 5
Views: 189
Posted By ross
Just some other hints to avoid you a bit of a...

Just some other hints to avoid you a bit of a headache (maybe you know all this but..).
Writing to SPRxCTL disable sprite x comparator so you need to set it with copper before DMA slot that fetch...
Forum: Coders. General Yesterday, 10:59
Replies: 5
Views: 189
Posted By ross
Yes, but remember that SPRxCTL defines when the...

Yes, but remember that SPRxCTL defines when the data fetch stops and new SPRxPOS/CTL need to be loaded by DMA.
So set SVx/EVx bits for a full screen cover then with copper change PTR and values for...
Forum: Coders. Asm / Hardware 19 August 2018, 22:13
Replies: 101
Views: 2,203
Posted By ross
Every time I read this things, I wonder if in...

Every time I read this things, I wonder if in fact the writer has ever really programmed on these architectures...

Have you ever thought of using a move.x dx,[ea] instead of clr.x [ea]? (where...
Forum: Hardware mods 18 August 2018, 22:23
Replies: 14
Views: 791
Posted By ross
Great! :great:great:

Great!
:great:great:
Forum: support.Games 13 August 2018, 19:55
Replies: 31
Views: 2,306
Posted By ross
Phew! This bug is absolutely hard to solve. ...

Phew! This bug is absolutely hard to solve.
There is evidence on the code that attempts have been made by the original programmers.

The routine used for this (unique!) water effect dynamically...
Forum: Coders. System 11 August 2018, 19:56
Replies: 22
Views: 540
Posted By ross
You can manually do it ;) I realize that it is...

You can manually do it ;)
I realize that it is a little inconvenient..
Forum: Coders. System 11 August 2018, 19:44
Replies: 22
Views: 540
Posted By ross
LoadSeg?

LoadSeg?
Forum: Amiga scene 08 August 2018, 16:28
Replies: 86
Views: 17,025
Posted By ross
True, but anyway in free mode and out of specs. ...

True, but anyway in free mode and out of specs.
And you can use another command for sync, like E8x :)

However it is really difficult to touch a format now stable for many years like that of PT..
Forum: project.WHDLoad 08 August 2018, 16:17
Replies: 85
Views: 7,602
Posted By ross
Immediate zero is allowed, so you can use subi.l...

Immediate zero is allowed, so you can use subi.l #0,$223D4 but is the same as tst.l ;) (and not directly usable in place because of the longer encoding).
Forum: project.WHDLoad 08 August 2018, 14:53
Replies: 85
Views: 7,602
Posted By ross
Well, the assembler could insert 0 in the quick...

Well, the assembler could insert 0 in the quick (3)bit encoding for the instruction but to gain a value the 0 is used as 8, so you can have only a subq from 1 to 8 ;)
Forum: project.WHDLoad 08 August 2018, 14:43
Replies: 75
Views: 7,531
Posted By ross
Sure!

Sure!
Forum: Amiga scene 08 August 2018, 14:41
Replies: 86
Views: 17,025
Posted By ross
Thanks! Not necessarily. Historically...

Thanks!


Not necessarily.
Historically command 8 is free so...

Simply new modules using command 8 would not play well with old players
(as happened for many other players of the past when...
Forum: Amiga scene 07 August 2018, 20:35
Replies: 91
Views: 3,936
Posted By ross
To the topic. Using "Amiga" (even in his...

To the topic.

Using "Amiga" (even in his virtual incarnations) makes me feel young and free :p
Forum: Amiga scene 07 August 2018, 20:29
Replies: 91
Views: 3,936
Posted By ross
Look at the coincidences. Just today I was...

Look at the coincidences.

Just today I was talking with a senior IT manager from a related company of B*W (yes, the Bavarian brand..)
He was cursing Windoze Powershell and the Un*x shell and...
Forum: project.WHDLoad 07 August 2018, 20:04
Replies: 85
Views: 7,602
Posted By ross
Actually I had not yet searched for the trainer's...

Actually I had not yet searched for the trainer's mem location so thanks modrobert :)

However, I will not look at it now :o
Forum: project.WHDLoad 07 August 2018, 19:55
Replies: 75
Views: 7,531
Posted By ross
I know ;) I looked for a moment in the SW...

I know ;)


I looked for a moment in the SW folder and I found this memo for myself (what i've done):
- 020+/aga fix
- PAL screen centered
- start with joystick(s) button
- high score fix
-...
Forum: project.WHDLoad 06 August 2018, 20:55
Replies: 75
Views: 7,531
Posted By ross
I'm a disaster! How many things have I left...

I'm a disaster!
How many things have I left pending?
:guru
Forum: project.WHDLoad 06 August 2018, 20:53
Replies: 85
Views: 7,602
Posted By ross
oh, thank you for reminding me. Well, so many...

oh, thank you for reminding me.
Well, so many things to do for the next season :)
Forum: project.WHDLoad 06 August 2018, 20:09
Replies: 75
Views: 7,531
Posted By ross
Just noticed that i've last modified Strider code...

Just noticed that i've last modified Strider code on April!

Well, don't worry, sooner or later I'll finish it, I just have to remind myself what was missing to make a proper release...

And...
Forum: Coders. Asm / Hardware 29 July 2018, 12:18
Replies: 87
Views: 3,700
Posted By ross
Yes, no more "pixels stretch" weird effect. And...

Yes, no more "pixels stretch" weird effect.
And I don't think there are more things to fix in this field.

Great work, thanks!
Forum: project.WHDLoad 25 July 2018, 20:49
Replies: 22
Views: 595
Posted By ross
I'm for a rewrite for the "random generator"...

I'm for a rewrite for the "random generator" through ROM patterns.
Two bird with a stone: no more ROM required by the slave and no more dumb absolute address check (so no more Access Fault error).
...
Forum: support.WinUAE 25 July 2018, 10:57
Replies: 13
Views: 517
Posted By ross
Why don't you simply speed up 68000 setup? ...

Why don't you simply speed up 68000 setup?


Yes you can.
There can be some limit cases where you can crash due to some bad code/timing, but I think rare enough,
or when you use system routine...
Forum: project.WHDLoad 25 July 2018, 10:11
Replies: 22
Views: 595
Posted By ross
Very clear, thanks. This explains the divergent...

Very clear, thanks. This explains the divergent operations in the various cases
(between similar versions of real hardware and also for the different configurations of WinUAE).

This is due to the...
Forum: support.WinUAE 25 July 2018, 08:33
Replies: 13
Views: 517
Posted By ross
You need to be more specific, but if you change...

You need to be more specific, but if you change from 020+ to 000 then is normal. A pure 68000 CPU cannot execute various enhanced instructions.


Also normal. Much games have only the first track...
Forum: project.WHDLoad 25 July 2018, 08:22
Replies: 22
Views: 595
Posted By ross
This is the Amigaaa Powaaa! :cool ...

This is the Amigaaa Powaaa! :cool


(checked on Ama*on, there are some really cheap crystal balls :D)
Forum: Coders. Asm / Hardware 25 July 2018, 00:29
Replies: 87
Views: 3,700
Posted By ross
You are welcome. :) Just to complete the...

You are welcome. :)

Just to complete the matter.
I've opened the right border (same exe, DIWSTOP=xxc8) and after some shift there also 'ghosting'. It's right this way?
(I perfectly remember the...
Forum: project.WHDLoad 25 July 2018, 00:05
Replies: 22
Views: 595
Posted By ross
Yes, checked the slave and the DIWs in copper...

Yes, checked the slave and the DIWs in copper list are not patched.
But there is a strangeness..
Yulquen74 specified that with WinUAE during the triangle sequence only a black screen and the red...
Forum: project.WHDLoad 24 July 2018, 22:57
Replies: 22
Views: 595
Posted By ross
I've only launched the exe (not have checked the...

I've only launched the exe (not have checked the slave) but it does not seem to have big problems.
Maybe the slave do not patch the wrong DIW values?
Forum: Coders. Asm / Hardware 24 July 2018, 18:03
Replies: 87
Views: 3,700
Posted By ross
I do not know if it can be useful, but attached a...

I do not know if it can be useful, but attached a little binary that takeover the system and you can perfectly observe the problem that I indicated in previous posts.

Setup: AGA, 020+, Subpixel...
Forum: Coders. Asm / Hardware 23 July 2018, 22:50
Replies: 87
Views: 3,700
Posted By ross
Good, another AGA feature emulated. At the end...

Good, another AGA feature emulated.
At the end the behavior that seemed so strange to me had a reason ;)
Not that now wants to try other oddities, I repeat, it was involuntary.

Thanks for the...
Forum: Coders. Asm / Hardware 23 July 2018, 19:28
Replies: 87
Views: 3,700
Posted By ross
More info about the "ghost" glitch. It's...

More info about the "ghost" glitch.

It's related to ddfstrt/ddfstop values: the max wide fetch ($18/$d8) generate the problem.
Any lower set (like $28/$d8 or $18/$c8, wb use these) do not create...
Forum: Coders. Asm / Hardware 23 July 2018, 17:37
Replies: 87
Views: 3,700
Posted By ross
Attached a working version. My apologies Toni. ...

Attached a working version.
My apologies Toni.


EDIT: I can also confirm that works like a charm in my patched Lionheart version.
That have a really delirantic copper list, BPLICON1 abuse and...
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